Ruler teaching apparatus



FIG. 1 is a top perspective view of a ruler teaching apparatus showing my new design;

FIG. 2 is a front elevational view of the ruler teaching apparatus according to the present invention;

FIG. 3 is a rear elevational view of the ruler teaching apparatus according to the present invention;

FIG. 4 is a top plan view of the ruler teaching apparatus according to the present invention;

FIG. 5 is a bottom plan view of the ruler teaching apparatus according to the present invention;

FIG. 6 is a left side elevational view of the ruler teaching apparatus according to the present invention; and,

FIG. 7 is a right side elevational view of the ruler teaching apparatus according to the present invention. 

The ornamental design of a ruler teaching apparatus, as shown and described. 